When a series of vicious murders sends a town reeling, Dr. Tony Hill becomes consumed with the notion that they are the work of the known killer, William 'Mack the Knife' MacAdam. Now a newly released inmate, and after receiving an education during his long sentence, MacAdam is now enrolled as a Ph.D. student in Tony's University class, and now seems overly keen to take Hill’s place as the media pundit on serial killer cases.